| | Species | Gene Symbol | Name | Evidence |
 | Human | SLC15A1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Rat | Slc15a1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Chimpanzee | SLC15A1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Dog | SLC15A1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Cow | SLC15A1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Chicken | SLC15A1 | solute carrier family 15 (oligopeptide transporter), member 1 | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Zebrafish | slc15a1b | solute carrier family 15 (oligopeptide transporter), member 1b | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | Fruit fly | CG2930 | CG2930 gene product from transcript CG2930-RD | HomoloGene; Ensembl ortholog; Blast (top hit) |
 | C. elegans | opt-2 | OligoPeptide Transporter | HomoloGene; Ensembl ortholog; Blast (top hit) |